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Yimi (Guangzhou) Automotive Parts Co, Ltd

  • China,Guangzhou
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China Engine Piston 8-97095-585-1 8970955851 For ISUZU 4HF1 NPR ELF Truck — Verified
China Engine Piston 8-97095-585-1 8970955851 For ISUZU 4HF1 NPR ELF Truck — Verified

  1. China Engine Piston 8-97095-585-1 8970955851 For ISUZU 4HF1 NPR ELF Truck — Verified
  2. China Engine Piston 8-97095-585-1 8970955851 For ISUZU 4HF1 NPR ELF Truck — Verified

Engine Piston 8-97095-585-1 8970955851 For ISUZU 4HF1 NPR ELF Truck — Verified

  1. MOQ: 4 pcs
  2. Price: Negotiable
  3. Get Latest Price
OEM Part Number 8-97095-585-1 / 8970955851
Vehicle Models ISUZU NPR, ELF 250/350 (1999–2009)
Piston Diameter 112 mm
Warranty 1 Year (standard replacement warranty)
Delivery Time 5-8 Work Days
Certifiion ISO/TS16949
Supply Ability 4000 pcs/month
Material Aluminum alloy with Alfin insert
Surface Treatment Tin coating
Engine Compatibility ISUZU 4HF1 (4.3L, naturally aspirated)
Construction Features Alfin insert, oil gallery, phosphate-skirt
Part Name Standard Engine Piston (with pin & clip options)
Payment Terms T/T
Packaging Details Neutral Package or as customers’ request
Piston Length 79 mm
Ring Groove (Top / 2nd / Oil) 3.0 / 2.5 / 4.0 mm
Compression Height (KH) 60.7 mm
Piston Pin Diameter 36 mm
Combustion Chamber 54 mm
Condition Brand New — 100% quality inspected
Model Number ISUZU 4HF1 NPR ELF
Certification ISO/TS16949
Brand Name YIMI
Place of Origin China

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  1. Product Details
  2. Company Details

Product Specification

OEM Part Number 8-97095-585-1 / 8970955851 Vehicle Models ISUZU NPR, ELF 250/350 (1999–2009)
Piston Diameter 112 mm Warranty 1 Year (standard replacement warranty)
Delivery Time 5-8 Work Days Certifiion ISO/TS16949
Supply Ability 4000 pcs/month Material Aluminum alloy with Alfin insert
Surface Treatment Tin coating Engine Compatibility ISUZU 4HF1 (4.3L, naturally aspirated)
Construction Features Alfin insert, oil gallery, phosphate-skirt Part Name Standard Engine Piston (with pin & clip options)
Payment Terms T/T Packaging Details Neutral Package or as customers’ request
Piston Length 79 mm Ring Groove (Top / 2nd / Oil) 3.0 / 2.5 / 4.0 mm
Compression Height (KH) 60.7 mm Piston Pin Diameter 36 mm
Combustion Chamber 54 mm Condition Brand New — 100% quality inspected
Model Number ISUZU 4HF1 NPR ELF Certification ISO/TS16949
Brand Name YIMI Place of Origin China
High Light Isuzu 4HF1 diesel engine piston ,OEM direct fit truck piston ,112mm STD Alfin oil-gallery piston
Engine Piston 8-97095-585-1 8970955851 For ISUZU 4HF1 NPR ELF Truck — Verified OEM Direct Fit, 112mm STD Alfin Oil-Gallery Diesel Piston
Product Overview

The Engine Piston with OEM numbers 8-97095-585-1 / 8970955851 is a verified direct-fit replacement for ISUZU NPR and ELF series trucks equipped with the 4HF1 (4.3L) diesel engine. This piston is a critical reciprocating component responsible for converting combustion pressure into crankshaft rotation and managing thermal load within the cylinder.

Technical Verification
  • Dimensional Verification: Piston diameter 112mm, compression height 60.7mm, pin diameter 36mm, total length 79mm, combustion chamber 54mm
  • Material & Construction: Aluminum alloy with Alfin insert for ring-land reinforcement, oil-gallery cooling channel, and tin coating
  • Ring Groove Geometry: Ring grooves sized 3.0mm (top) / 2.5mm (second) / 4.0mm (oil control)
  • OEM Cross-Reference Verified: Replaces multiple OEM part numbers including 8-97095-585-1, 8970955851, and others
Failure Symptoms — When to Replace
  • Loss of engine compression: Worn or stuck piston rings reduce cranking pressure
  • Excessive exhaust smoke (blue/white/black): Indicates oil passing rings or incomplete combustion
  • Increased oil consumption: Glazed bores or tired ring packs allow oil entry
  • Rough idle or misfire: Inconsistent compression across cylinders
  • Visible scoring or wear: Physical damage to piston skirts or liner walls
Product Specifications
Part Number 8-97095-585-1 8970955851
Product Name Piston
Car Model ISUZU NPR ELF
Engine Model ISUZU 4HF1
Condition 100% Brand New
Size Standard
ISUZU 4HF1 Engine Piston - OEM 8-97095-585-1
Vehicle & Engine Compatibility
Brand Model / Series Chassis Engine Years
ISUZU NPR NPR 4HF1 1999-2009
ISUZU ELF 250 NKS 4HF1 1993-1994
ISUZU ELF 350 NKR 4HF1 1990-1993
Important Fitment Notes: Confirm engine variant (4HF1 vs. 4HF1-2), verify piston-to-bore clearance and liner protrusion, and always verify OEM number against engine tag before ordering.
Features & Benefits
Alfin Insert
Reinforces top ring groove against thermal fatigue and micro-welding
Oil-Gallery Construction
Improves heat dissipation from crown and ring zone, reducing scuffing risk
Tin Coating
Enhances break-in characteristics and reduces friction during initial operation
Precision Ring Grooves
Ensures correct ring seating and sealing to restore compression
112mm STD Diameter
Direct-fit replacement for original bore without machining
Quality Control & Verification
QC Item Verification Method
Piston diameter / ovality CMM dimensional inspection against OEM drawing
Ring groove width & depth Go/no-go gauge verification
Pin bore diameter & concentricity Precision bore gauge
Material chemistry Spectrometer analysis (aluminum alloy composition)

Manufacturing conforms to GB1148-82, JB3931-85, and JB3932-85 piston standards.

Installation & Maintenance Recommendations
IMPORTANT: Professional engine rebuild experience required. Always refer to the ISUZU 4HF1 workshop manual for complete specifications.
Installation Guidelines
  1. Verify fitment: Confirm piston diameter (112mm), compression height (60.7mm), and ring groove dimensions
  2. Check piston-to-bore clearance: Measure cylinder liner bore and piston skirt diameter
  3. Ring installation: Install rings with correct orientation; stagger ring end gaps at 120° intervals
  4. Pin & clip installation: Lubricate pin bore and install piston pin; secure with new snap rings
  5. Connecting rod torque: Follow manual sequence for specific engine variant
Maintenance Schedule
  • Inspect compression and oil consumption every 50,000 km or annually
  • Replace piston rings and inspect pistons during any top-end overhaul
  • When abnormal striking sounds are heard, replace piston and piston pin as a set
Packaging & Supply
  • Standard packing: Corrugated carton with anti-rust paper; 4 pcs in one box
  • Set options: Piston only, or piston set with pin & clips
  • Suitable for: Engine rebuild workshops, fleet maintenance departments, spare parts distributors

Company Details

Bronze Gleitlager

,

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 and 

Graphite Plugged Bushings

 from Quality China Factory
  • Business Type:

    Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller

  • Year Established:

    2005

  • Total Annual:

    8000000-10000000

  • Employee Number:

    100~150

  • Ecer Certification:

    Verified Supplier

Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...

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Get in touch with us

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  • Yimi (Guangzhou) Automotive Parts Co, Ltd
  • Unit 1313, Building 5, Changsheng DDP Fashion Center, No. 17 Dachi Road, Tancun, Shijing Subdistrict, Baiyun District, Guangzhou City.
  • https://www.isuzucarsparts.com/

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